Electric heater.



110.7%,973. PA TBNTBD MAY 26,1903. ELF. PORTER. v

ELECTRIC HEATER.

APPLICATION FILED FEB. 6, 1900.

K0 )lODEL. 2 SHEETS-SHEBT 1.

Flu van to! warmin I I PATENTED MAY 26, 1903.

E.VF.PORTER. ELECTRIC HEATER. APPLIOATIbH FILED FEB. 6, 1900.

30 MODEL.

PETERS co Puomu'ma. wunmswu, n. c.

UNITED STATES l atented May 26, 1903.

PATENT OFFICE.

EDW'IN F. PORTER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE BAY STATEELECTRIC HEAT 82; LIGHT COMPANY, OF JERSEY CITY, NEW JERSEY, ACORPORATION OF NEW JERSEY.

ELECTRIIC HEATER.

SPECIFICATION forming part of Letters Patent No. 728,973, dated May 26,1903. Application filed February 6, 1900. Serial No. 4,293. (No model.)

To all whom it may concern:

Be it known that I, EDWIN F. PORTER, of Boston, (Dorchester,) in thecounty of Suffolk and State of Massachusetts, have invent- 5 ed certainnew and useful Improvements in Electric Heaters, of which the followingis a specification.

My invention relates to improvements in electric heaters, and especiallyto switches where it is necessary to divide the electric current toestablish one or more branch currents.

To illustrate the application of my invention, I have shown it asembodied in an elec- 5 tric-fan-heating apparatus such as is disclosedand claimed in United States patent to Mark W. Dewey, No. 449,404, datedMarch 31, 1891.

In this fan-heating apparatus it will be seen that it is necessary todivide the electric current to carry one part to the blades for thepurpose of heating them and the other part to the motor for the purposeof giving motion to the fan, which motion displaces or removes theheated air from the heating-surfaces.

The object of my invention is to render it impossible to stop the fan inits revolution without shutting olf that part of the current which heatsthe resistance-wires on the blades, so that the fan becomes cool whileit is stand- 0 ing still; and a further object is to start the fan atthe moment the current is turned on to the heating resistances, so thatit is impossible to heat the fan without setting it in monon.

5 The object of keeping the fan in motion while it is being heated is to.prevent its destruction, which would be the case if it were standingstill while being heated, as the air coming in contact with theresistances when 0 the fan is revolving lowers the temperature of saidresistances, the motion being thus a safeguard to prolong the life ofthe apparatus by removing the heated air rapidly from the surfaces.

5 In this application of my invention it will be understood that the twoobjects attained are, first, that the heat cannot be turned on withoutturning on the speed and the speedcannot be turned off without turningofi the 0 heat, and, further, that the variable speeds may be turned onand the fan used asasummer fan without turning on the heat at all, sothat three difierent effects are produced in the manipulation of thisswitch.

Myinvention consists of certain novel features hereinafter described,and particularly pointed out in the claims.

In the accompanyingdrawings,which illustrate a construction embodying myinvention, Figure 1 is a side elevation of an electric fan and a planview of my improved switch for controlling the current which operatesthe motor and also controlling the current which heats the resistance onthe blades. Fig. 2 is a detail view illustrating one of the fan-blades.Fig. 3 is an enlarged detail view showing a plan view of the switch.Fig. 4 is a transverse vertical sectional view through the switch.

Like letters of reference refer to like parts throughout the severalviews.

On the support A there is mounted a suitable electric motor B, havingthe usual shaft C, upon which is mounted the hub D, carrying the bladesE, which constitute the revolving fan. Through the main electriccondoctor or wire F the electric current passes to the switch G, mountedon the insulatingpin G, projecting from the insulating base plate G andsaid wire F is connected to the switch G, as shown at the point G Partof the current passes along the lever H to the contact-point H (with thelever in the position shown in the drawings) and then through theresistances J and J out through the branch electric conductor or wire Kto the motor B at K through the motor and out at K through the wire K.It will be seen that the resistances J and J may be cut out by placingthe switch-lever H in contact successively with the pins H and H therebyvarying the speed of the motor, as the less the resistance the greaterthe speed. The other branch of the current passes to the heater alongthe lever L, also pivoted on the insulating-pin G, to

the contact-point M, and on through the 5 branch electric conductor orwire M to the brush-holder M and then through the brush M thecollector-ring M on through the wire M which is continued on the face ofthe blade and held by insulating-pins M (see Fig. 2), the wire formingthe heating resistance, as shown and described in the Dewey patent,above referred to, and the current after heating the resistances, whichare in series, finally passes through the wire M from the last blade tothe other collectorring M to the brush M to the brush-holder M and outthrough the wire M The motion of the fan displaces or removes the heatedair from the heating-surfaces. The lever L is joined at L and when thesection L is moved by the operator for the purpose of breaking thecircuit said motion elongates the spring L causing the section L to makea quick break with the contact point M. When the lever G is moved tobreak the circuit at H, it is necessary to also break the circuit at thecontact-point M. This must necessarily be a quick break, and it iseffected by the lever H compressing the spring L which spring, when thesection L of the lever L leaves the contact-point, throws said leverquickly clear toward the right of the drawing and breaks theheater-circuit at this point M and at the same time the speed-circuit isbroken by the movement to the right of the lever H. When both circuitsare broken and the lever H is moved to the left for the purpose ofestablishing the circuit through the motor, the lever L is not moved, asthe spring L is secured only to the lever H by the pin L in the socket Lthe other end working loosel in a socket L in the section L of the leverL. The lever H may then be advanced over the several points ofresistance to vary the speed of the motor, the heating-switch remainingin its open position, as it is not connected to the lever H. Startingagain with both levers in their open position and moving the lever onlyto the left, it will be seen that when contact is made at thepoint Mcontact will simultaneously be made at the point H by virtue of thecontact, respectively, between said points M and H and the levers L andH. The lever H will not be thrown beyond the point I-I, because thefriction at said point is greater than the force of the spring L In thereverse motion when the lever H is moved to the right the lever L,because of its friction with the point M, is not thrown out of contactby the spring, but by the actual contact of the two levers when aftersaid friction is overcome at the point M the spring throws the leverclear. Briefly, in other words, when both circuits are broken and it isdesired to heat the apartment the lever L is moved to close the circuitthrough the point M to the heater, and the lever H is moved to the leftto close the circuit through the point H to the motor, and, further, thelever H cannot be moved to the right without at the same time moving thelever L to the right. The heating resistances or conductors which formthe electric heater instead of being mounted on the fan-blades, as shownin the drawings, may be located on a suitable disk adjacent to the fan,as shown in Fig. 8 of the Dewey patent, above mentioned, and theoperation would be the same as previously described for a heater locateddirectly on the fan-blades.

I do not limit myself to the arrangement and construction shown, as thesame may be varied without departing from the spirit of my invention.

Having thus ascertained the nature of my invention and set forth aconstruction embodying the same, what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. In an apparatus of the character specified, one or moreheat-developing electric conductors forming an electric heater, anelectric circuit including said heater, movable means for displacing orremoving the heat from said heater, a motor for operating said movablemeans, an electric circuit including said motor, and a switch consistingof two sections one of which is adapted to make and break themotor-circuit and to operate the other section when moved in onedirection to break the heater-circuit and to operate independently ofthe other when moved in the other direction.

2. In an apparatus of the character specified, one or moreheat-developing electric conductors forming an electric heater, anelectric circuit including said heater, movable means for displacing orremoving the heat from said heater, a motor for operating said movablemeans, an electric circuit including said motor, a switch forcontrolling the heatercircuit, and a switch for controlling themotorcircuit adapted to operate the heater-circuit switch to break theheater-circuit when operated to break the motor-circuit and to be movedindependently of the heater-circuit switch to close the motor-circuit.

3. In an apparatus of the character specified, one or moreheat-developing electric conductors forming an electric heater, anelectric circuit including said heater, a fan for displacing or removingthe heat from said heater, a motor for operating the fan, an electriccircuit including said motor, a switch for controlling theheater-circuit, and a switch for controlling the motor-circuit adaptedto operate the heater-circuit switch to break the heater-circuit whenoperated to break the motor-circuit and to be moved independently of theheater-circuit to close the motor-circuit.

4. In an apparatus of the character specified, one or moreheat-developing electrical conductors forming an electric heater, anelectric circuitincluding said heater, a fan for displacing or removingthe heat from said heater, a motor for operating said fan, an electricalcircuit including said motor,a switch for controlling the motor-circuit,and a switch for controlling the heater-circuit adapted to operate themotor-circuit switch to close the motor-circuit when moved to close theheatercircuit and to be moved independently of the motor-controllingswitch to break the heatercircuit.

5. In an apparatus of the character specified, an electric heater,movable'means for displacing or removing the heat from said heater, amotor for operating said movable means, an electric conductor connectedto said heater and forming the heater-circuit, an electric conductorconnected to said motor and forming the motor-circuit, a switch forcontrolling the motor-circuit, and a switch for controlling theheater-circuit adapted to operate the motor-circuit switch to close themotor-circuit when moved to close the heatercircuit and to be movedindependently of the motor-controlling switch to break theheatercircuit.

6. In an apparatus of the character specified, an electric heater,movable means for displacing or removing the heat from said heater, amotor for operating said movable means, an electric conductor connectedto said heater and forming the heater-circuit, an electric conductorconnected to said motor and forming the motor-circuit, a switch forcontrolling the heater-circuit, and a switch for controlling themotor-circuit adapted to operate the heater-circuit switch to break theheater-circuit when moved to break the motor-circuit and to be movedindependently of the heater-circuit switch to close the motorcircuit.

7. In an apparatus, of the character specified, one or moreheat-developing electric conductors forming an electric heater, anelectric circuit including said heater, a fan for displacing or removingthe heat from said heater, a motor for operating said fan, a circuitincluding said motor, a switch for controlling the heater-circuitadapted to operate the motor-circuit switch to close the motor-circuitwhen moved to close the heatercircuit and to be moved independently ofthe motor-controlling switch to break the heater-circuit, and a switchfor controlling the motor-circuit adapted to operate the heater circuitswitch to break the heatercircuit when operated to break themotorcircuit and to be moved independently of the heater-circuit switchto close the motor-circuit.

8. In an apparatus of the class specified, one or more heat-developingelectric conductors forming an electric heater, movable means fordisplacing or removing the heat from said heater, a motor for operatingsaid movable means, an electric circuit divided into two branchesrespectively including said heater and said motor, and a switchcontrolling said circuit operating to close the branch circuit includingthe motor when moved to close the branch circuit including the heater.

9. In an apparatus of the class specified,- one or more heat-developingelectric conductors forming an electric heater, movable means fordisplacing or removing the heat from said heater, a motor for operatingsaid movable means, an electric circuit divided into two branchesrespectively including said heater and said motor, and a switchcontrolling said circuit operating to break the branch circuit includingthe heater when moved to break the branch circuit including the motor.

10. In an apparatus of the class specified, one or more heat-developingelectric conductors forming an electric heater, movable means fordisplacing or removing the heat from said heater, a motor for operatingsaid movable means, an electric circuit divided into two branchesrespectively including said heater and said motor, and a switchcontrolling said circuit and operating to close the branch circuitincluding the motor independently of the branch circuit including theheater.

11. In an apparatus of the class specified, one or more heat-developingelectric conductors forming an electric heater, movable means fordisplacing or removing the heat from saidheater, a motor for operatingsaid movable means, an electric circuit divided into two branchesrespectively including said heater and said motor, and a switchcontrolling said circuit and operating to break the branch circuitincluding the heater independently of the branch circuit including themotor.

12. In an apparatus of the-class specified, one or more heatdevelopingelectric conductors forming an electric heater, movable means fordisplacing or removing the heat from said heater, a motor for operatingsaid movable means, an electric circuit divided into two branchesrespectively including said heater and said motor, and a switchcontrolling said circuit and operating to close the branch circuitincluding the motor when moved to close the branch circuit including theheater, or to break the circuit including the heater when moved to breakthe branch circuit including the motor, or to make or break the branchcircuit including the mo-. tor independently of the branch circuitincluding the heater.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 31st day of January, A. D.1900.

EDWIN F. PORTER.

Witnesses:

A. L. MEssER, O. A. STEWART.

